Safety fire-stop valve



2 SHEETS-SHEET l.

Patented Apr. 5, 1921.

v INi ENTOR; 19 a. Maxie.

A TTORNE Y.

H. G. MAULE.

SAFETY FIRE STOP VALVE. APPLICATIO-N FILED MAY 10. 1920.

1,373,902; Patented Apr- 5,1921.

2 SHEETSSHEET 2.

'EQHILEI L 7 I I INVENTOR.

.4 TTORNEY.

UNITED sr HARVEY GRANGER M'AULE, OFSEATTLE, WASHINGTGN, A$SIGNOR OFONE HALF TO REGINALD A. PEARCE, OF KING COUNTY, WASHINGTON."

SAFETY Fran-STOP VALVE; V

sp cifi mmeesPasa- Patented Apr. 5,;1921.

Application filed. MaylO, 1920. Serial No. 380325.

T 0 all whom it may concern Be it known that I, HARVEY G. M ULE, a

citizen of the United States, and residing at,

the fuel pipes of the system, such control may be instantly had as to prevent leakage of the fuel and consequent danger from fire.

In such systems, particularly the fuel feeding system on oil'burning ships, there is liability of the pipe bursting under excessive pressure, and the consequent spraying or leakage of the oil on surroundingobjects and a resultant tendency to fire. With the use of my valve control means, applied in such a system, anyone having a knowledgeof' a leakage can instantly control the system to direct the oil into a tank provided for the purpose, and under suction to compel the flow of the oil toward said tank, and thereby minimize the leakage and loss of oil.

In the drawings Figure 1 is a view indicating more or less diagrammatlcally a system of supply for oil burning furnaces, and showing my improved valve control mechanism applied thereto.

Fig. 2 is an enlarged elevation of the valve control mechanism. V

Fig. 3 is a transverse section through one of the valves. 7

Fig. 4. is a longitudinal section through one of the valves.

The system herein shown, which is intended to conventionally illustrate the oil feeding system for a furnace, as used aboard oil burning ships, comprises a furnace 1 heated through oil burners arranged in a casing 2, below the furnace, the fuel being supplied from an oil tank 3 through a pipe 4. The pipe 4: leads to and through a pressure pump 5 operated by steam through a pipe 6 leading from the boiler 1. Exhaust steam from the pump 5 is led'through a pipe 7 to the burners within the casing 1, joining the oil supply pipe 4, adjacent itsdelivery end, to add to the pressure of the supply and also atomize the oil, A safety pipe 8 leads from I the pump 5 to thetank 3 having therein the usual snifter valve arranged to relieve the system at anypredetermined pressure.

The system as so far ClQSCIIbGCl'lS conventionally illustrative of an oil supply system for furnaces, the various parts described being suitably arranged, for example in'a. vessel 10. My improved control mechanism includes three valves 11, 12 and 13,-each of similar construction, to be later specifically described, said valvesbeing supported in" spaced relation upon a suitable base 1 1.

The oil feed pipe a from the tank is led through the valve 13 and from the valve to the pump 5; while the steam supply pipe 6 is led from the furnace through the valve 11 and thence to thepump A'by-pass' 15 i communicates with the pipe Sbetween the pump and snifter valve9, such pipe 15 leadingthrough'the valve 12 and thence to a pipe 16 which communicates with a tank 17 adapted to be held under a vacuum or suction. A'p1pe 18 leads from the steam supply which is in turn a communication through'a pipe 20 with the suction tank 17. The pipe 16 leads beyondits connection with the pipe 15 to and is in communication with'the oil feed pipe 4:, said pipe 16 being provided with check valves 21 which open under pressure toward the feed pipe 4.

The respective valves 11, 12 and 13 are of identical construction, each comprising a casing 22 havingan inlet 23 and a diametrically opposed outlet 2 1'; A valve body rotatably mounted on trunnions 26 in the casing 22, and slidably supports a valve proper 27 having a bearing face -28 adapted to cooperate with the outlet 24 to close the same. The valve slidably embraces the body l 25 and is held in'contact with the surface of the casing by springs 29. The valves 11, 12 and 13 are arranged line and one trunnion 26 of eachis extended beyond the. casmg and terminally formed to permit the application thereto of'a fixed link 30. The I lower ends of the links are connected by a tie bar 31, so that allvalves may be operated in unison, and one of the links, as forexample that cooperating with valve 12 is extended s0 6 between the valve 11 and the pump 5, said pipe 18 leading to an auxiliary pump 19 7 valve 12.

above the valve as a hand bar 32 from which extends a cable 33 which may be led to those portions of the ship from which it is desired to control the system.

VVi'th the system in operation valves 11 and 13 are opened and valve i2 closed. The pumps can now operate to deliver oil to the burners and to maintain the suction in tanl 17. In the event of breakage in the system, as for example the bursting of the oil pipe under excessive pressure, such as may occur if the snifter valve fails to operate, any attendant upon the knowledge of spch leakage will operate the valves through the cable 33, closing valves 11 and 13 and opening The oil pipes of the system'are thus opened to the suctiontank l7, and the oil instead ofbeing scattered over the surrounding surfaces will be drawn into said tank. Liability of fire is thus avoided, and the oil otherwise lost will be stored in such tank 17 for further use.

Claims:

1. In an oil burning system, an oil supply tank, a pump for delivering oiltherefrom under pressure to a burner, a motive fluid for the pump, a suction tank, a communi cation between said suction tank and the oil system, a normally open valve for the oil from the supply tank, a normally open valve for the motive fluid for the pump, and a normally closed valve controlling communication with the suction tank.

2. In an oil burning system, an oil supply tank, a pump for delivering oil therefrom under pressure to a burner, a motive fluid for the pump, a suction tank, a communi cation between said suction tank and the oil system, a normally open valve for the oil from the supply tank, a normally open valve for the motive fluid for the pump and a normally closed valve controlling communication with the suction tank,'and means for simultaneously operating all of said valves 7 to reverse their positions. 7 4 3. In an oil burning system, an oil supply tank, a pump for delivering oil therefrom under pressure to a burner, a feed connection for conveying oil from the tank tothe pump, a return connection from the pumps to'the tank for excess oil from said pump, a V motive fluid for the pump,a suctiontank, a connection between the suction tank and the feed connection, a connection with the suction tank and the return connection, a normally open valve for controlling the feed connection, a normally open valve for the motive fluid, and a normally, closed valve controlling communication with the suction tank. 7 j 6 4. In an oil supply system,,an oil supply:., tank, a pump for delivering oil under pressure to a burner, a feed pipe connecting the supply tank and pump, a return pipe from the pump to the tank for excess oil fromthe 6 pump, a motive fluid for the pump, a suction tank, a connection between the suction tank and oil feed pipe, a connection between the return pipe and suction tank, check valves 7 for establishing one way communication in 7 the connection between'the suction tank and oil teed pipe, a normally open valve for con-- trolling the oil in the feed pipe, a normally open valve for the motive fluid, a normally closed valve controlling communication with 7 the suction tank, and means for simultaneously operating all ofsaid valves to reverse their positions. r In testimony whereof I afliz; my signature.

HARVEY GRANGER li LLTLE. 

